1. V. Kh. Abiants, Effect of Radial Clearance in Vanes on the Efficiency of Gas Turbines [in Russian], Oborongiz (1947).
2. B. I. Kostetskii, M. E. Belitskii, and M. É. Natason, Col.: Powder Metallurgy [in Russian], 2, Izd. An UkrSSR, Kiev (1964), p. 40.
3. M. E. Belitskii and B. I. Kostetskii, Col.: Friction Lubrication, and Wear of Machine Parts [in Russian], Redizdat KIGVF (1964), p. 83.